[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [linux-lvm] [dm-devel] fix corrupted thin pool



Dne 26.10.2014 v 20:46 Vasiliy Tolstov napsal(a):
2014-10-26 2:47 GMT+04:00 Zdenek Kabelac <zkabelac redhat com>:
 From the metadata  something bad was going one:

Fri Oct 24 17:03:04 2014

transaction_id = 120  - create = "3695"

And suddenly on Fri Oct 24 18:07:23 2014
pool is back on older transaction_id

transaction_id = 114


Is that the time of your vgcfgrestore?

I'm attaching those metadata which you likely should put back to get in sync
with your kernel metadata (assuming you have not modified those in any way)


Hm yes, i miss that one vg created in this time, thanks. As i
understand transaction id needs to be changed? Or something other?
But i have error:

lvchange -ay vg1/2735
   Check of thin pool vg1/tp1 failed (status:1). Manual repair required
(thin_dump --repair /dev/mapper/vg1-tp1_tmeta)!



If you would have latest lvm2 tools - you could have tried:

lvconvert --repair  vg/pool


With older tools - you need to go in these manual step:


1. create temporary small LV
# lvcreate -an -Zn -L10 --name temp vg

2. replace pool's metadata volume with this tempLV
# lvconvert --thinpool vg/pool  --poolmetadata temp
(say 'y' to swap)

3. activate & repair metadata from 'temp' volume - you will likely need another volume where to store repaire metadata -
so create:
# lvcreate -Lat_least_as_big_as_temp  --name repaired  vg
# lvchage -ay vg/temp
# thin_repair -i /dev/vg/temp  /dev/vg/repaired

if everything when fine - compare visualy 'transaction_id' of repaired metadata (thin_dump /dev/vg/repaired)

4. swap deactivated repaired volume back to your thin-pool
# lvchange -an vg/repaired
# lvconvert --thinpool vg/pool --poolmetadata repaired

try to activate pool -  if it doesn't work report more problems.

Zdenek



[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]